We have seen some incredible breakthroughs in technology lately but one issue that still needs to be solved is that of battery trouble. No matter how fancy a gadget gets, it is almost always limited by its battery life. The next big thing the world of tech requires is never-ending batteries, and looks like MIT is paying attention.

A group of researchers at the university are working on self-charging batteries, which in turn means never-ending battery life. The idea is to produce electrical energy out of the mechanical energy of locomotion. The mechanical energy produced as a result of walking can be used to charge electronic devices.

The procedure involves two thin sheets of lithium alloys to serve as electrodes with a porous sheet of polymer, after it has been soaked in liquid electrolyte, placed in between. This design is efficient at moving lithium ions, while at the same time being attached to sensors on the joints on the body like knees or wrists. The sensors would absorb mechanical energy of locomotion and convert it to electrical energy.

This tech could also be used to charge wearables like smartwatches, along with phones. However there is still a long way to go. Right now, the use of this technique can achieve 15% efficiency for a gadget at best. The research team hopes to increase this efficiency to a 100% soon.